What are the evidences of the Malikis regarding the exemption from wearing a beard, greeting the mosque when the Imam is seated on the pulpit, and the permissibility of praying in graveyards with the presence of disfavor (karahah)?

The Maliki school does not differ from the majority in the prohibition of shaving the beard and the validity of prayer in graveyards as long as they are not impure. However, it differs from them regarding the "Tahiyyat al-Masjid" (salutation of the mosque) prayer after the Imam has sat on the minbar. The Malikis prohibit it and forbid any supererogatory prayer during the sermon, citing as evidence the hadith (definition) of the man who stepped over people's necks, whom the Prophet (peace be upon him) commanded to sit down without performing rukoo’ (bowing). They also cite the saying, "If you say to your companion, 'Listen!' while the Imam is delivering the sermon, you have engaged in idle talk," which prohibits even enjoining good (or forbidding evil in this context), so a recommended act is even more so. They consider the hadith of Sulayk al-Ghatafani to be abrogated or outweighed, because their hadith is more preferable due to its connection with the practice of the people of Medina and its consistency with analogical reasoning.